Abstract: A container closure is provided. The container closure may include a male clip piece having an engaging tongue and a female piece having a receiving slot. Both pieces may have a mounting portion. The engaging tongue may include a plurality of uniformly spaced forward ramps defining a plurality of uniformly spaced troughs. The receiving slot may be a tube having an inner surface including a plurality of uniformly spaced rear ramps. A user may mount the container closure onto a container so that the female clip piece and the male clip piece may be on opposite sides of an opening of the container. The user may then urge the engaging tongue into the receiving slot so that at least one forward ramp may pass at least one rear ramp so that the at least one rear ramp may snap into the at least one trough thereby releasably interlocking the female clip piece and the male clip piece.